The Bosphorus Strait: Exchange fluxes, currents and sea-level changes

Ozsoy, E
Latif, MA
Besiktepe, ST
Cetin, N
Gregg, MC
Belokopytov, V
Goryachkin, Y
Diaconu, V
The flows through the Turkish Straits System (comprised of the Straits of Bosphorus and Dardanelles, and the Sea of Marmara) are subject to a great degree of transient variability, depending on the atmospheric factors and the water budget. As a result of the rapid along-strait variations in the strait geometry, the sharp stratification, and the temporary blocking of the flows in either direction, the maximal exchange regime of controlled flows in the Bosphorus exhibit complex non-linear response to forcing (by the net water budget, pressure and wind setup effects in adjacent basins), resulting in the observed time dependence from daily to interannual time scales. One consequence is the observed controls on sea level changes. Complex relationships exist between the exchange flows, sea level variations, net water budgets and atmospheric pressure variations in the adjacent basins, and are not so easily understood within the full range of time scales. We make a first attempt to discuss these relationships in some detail.


The distribution of man-made and naturally produced halocarbons in a double layer flow strait system
Fogelqvist, E; Tanhua, T; Basturk, O; Salihoglu, I (1996-08-01)
The Bosphorus Strait, which connects the Black Sea and Mediterranean Sea via the Marmara Sea, is characterised by two distinct water masses. The upper layer consists of low density Black Sea water (sigma-t 10-11) flowing southward, and it is underlain by high density water (sigma-t > 28) of Mediterranean origin flowing northward. The sharp density gradient between the two layers is due to the difference in salinities. Here we report measurements on a suite of low molecular weight halocarbons together with b...
OGUZ, T; LAVIOLETTE, PE; UNLUATA, U (American Geophysical Union (AGU), 1992-08-15)
Quasi-synoptic hydrographic data and satellite imagery are used to describe the circulation and the structural variability of the Black Sea with particular emphasis on the Turkish coast. The circulation is indicated to involve a variable cyclonic circulation with no apparent central locus and a well-defined cyclonic "Rim Current" containing meanders and interacting eddy fields confined to the shelf slope. Interspersed between the coastal eddies are filaments and intense jets, often with dipole eddies at the...
JOHNS, B; OGUZ, T (1990-03-01)
A numerical model is developed for the exchange of water between the Black Sea and the Marmara Sea through the Bosphorus. An essential part of the modelling procedure is the use of a turbulence energy equation in a scheme of turbulence parametrization. The simultaneous application of a transport equation for the salinity leads to a turbulence suppression term associated with the existence of a strongly stable vertical salinity stratification. Experiments are performed that show how a prescribed difference b...
Water Exchange through Canal İstanbul and Bosphorus Strait
Sözer, Adil; Ozsoy, E. (National Documentation Centre (EKT), 2017-2-13)
The Turkish Straits System (TSS) regulates the transports of water, material and energy between the Black Sea and the Mediterranean Sea. Amidst existing environmental threats to the region surrounding I.stanbul, the environmental footprint of the proposed Canal I.stanbul project needs to be evaluated through methods of natural science. We take the elementary step to answer the particular problem of coupled strait dynamics by adding the Canal to an existing hydrodynamic model and estimate changes in their co...
The trophic and fishery impact of invasive Nemipterus randalli (Russell, 1986) in the northeastern Mediterranean Sea
Akgün, Yağmur; Bilgin, Cemal Can; Akoğlu, Ekin; Department of Biology (2022-8-31)
The Eastern Mediterranean Sea is one of the most invaded marine ecosystems under the impact of Lessepsian species which migrated from the Red Sea to the Mediterranean Sea after the construction of the Suez Canal. The impacts of Lessepsian species on the indigenous fish and fisheries can be both positive and negative. This study aimed to delineate the commonly seen Lessepsian species Randall’s threadfin bream (Nemipterus randalli)’s impact on the food web and fishery dynamics besides current ecosystem health...
Citation Formats
E. Ozsoy et al., “The Bosphorus Strait: Exchange fluxes, currents and sea-level changes,” 1997, vol. 47, p. 1, Accessed: 00, 2020. [Online]. Available: